Merge branch 'maint'

* maint: git-gui: work from the .git dir git-gui: Fix applying a line when all following lines are deletions git-gui: Correct file_states when unstaging partly staged entry git-gui: Fix gitk for branch whose name matches local file git-gui: Keep repo_config(gui.recentrepos) and .gitconfig in sync git-gui: handle really long error messages in updateindex. git-gui: Add hotkeys for "Unstage from commit" and "Revert changes" git-gui: Makefile: consolidate .FORCE-* targets